You have been tasked with installing two SRX 5600 platforms in a high-availability cluster. Which requirement must be met for a successful installation？（）
第1题：
A、tire, did…do
B、tiring, have…done
C、tired, do…do
D、tired, have…been doing
第2题：
If you had been have yesterday，you______(see)his father.
第3题：
A.Do you try
B.Have you tried
C.Are you trying
D.Have you been trying
第4题：
一____________?
一I’v never been there but I hope to go there in the future.
A .Where are you going for holiday
B. Have you been to America
C. What did you do last week
第5题：
--- ____?
一I’ve never been there but I hope to go there in the future.
A.Where are you going for holiday
B.Have you been to America
C.What did you do last week
第6题：
Where ________ you ________?
A.are/be
B.have/be
C.is/be
D.have/been
第7题：
Have you ever been to the place? You can see many places of interest there．（合并为一句）
Have you ever been to the place ________you can see many places of interest?
第8题：
A. have understood
B. understood
C. will understand
D. would have understood
第9题：
--- ______?
--- I’ve never been there but I hope to go there in the future.
A. Have you been to America
B. Where are you going for holiday
C. What did you do last week
第10题：
A、might meet
B、might have met
C、may have met
D、may have been met